关键词: 高磷鲕状赤铁矿, 提铁降磷, 磁选, 浮选, 浸出, 深度还原短流程

Abstract: To increase the development and utilization level of iron resources in our country， increase the iron self-sufficiency degree， based on the mineral properties of high-phosphorus oolitic hematite， the present high phosphorus oolitic hematite utilization situation， the process and mechanism of iron extraction and phosphorus reduction were reviewed. It was pointed out that although conventional mineral processing methods such as single flotation， selective flocculation-reverse flotation and flotation-magnetic combination are easy to operate， the separation indexes such as grade and recovery of iron concentrate are low， and the dephosphorization rate is low， which makes it difficult to achieve the ideal effect of iron extraction and dephosphorization； chemical leaching， biological leaching and smelting methods have costs and environmental problems， although the dephosphorization effect is remarkable. On the basis of summarizing the existing research results and a large number of experimental studies， the relevant research group of Northeast University proposed a low-consumption and high-efficiency process for iron extraction and phosphorus reduction， i.e. deep reduction short-process smelting technology， which takes iron ore→metal iron→hot Metal→hot metal impurity removal→forming steel as the process route， with short process flow and high heat utilization rate. The principle and Prospect of this technology are also discussed. The process has the advantages of short process flow and high heat utilization rate， can realize the high-efficiency separation of high-phosphorus oolitic hematite.

Key words: High phosphorus oolitic hematite, Iron increase and phosphorus removal, Magnetic separation, Flotation, Leaching, Deep reduction short-process smelting technology